James Fitzroy McCarthy (1853–1919) was an Irish

surveyor Surveying or land surveying is the technique, profession, art, and science of determining the terrestrial two-dimensional or three-dimensional positions of points and the distances and angles between them. These points are usually on the ...

and

cartographer Cartography (; from , 'papyrus, sheet of paper, map'; and , 'write') is the study and practice of making and using maps. Combining science, aesthetics and technique, cartography builds on the premise that reality (or an imagined reality) can ...

who played a prominent role in the delimitation of the borders of

Thailand Thailand, officially the Kingdom of Thailand and historically known as Siam (the official name until 1939), is a country in Southeast Asia on the Mainland Southeast Asia, Indochinese Peninsula. With a population of almost 66 million, it spa ...

(then known as Siam) in the late nineteenth century, helping transform the country into a modern nation-state. He served as the first Director-General of the Royal Thai Survey Department, which was established in 1885.

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